Magnetic brake structure



Dec; 31, 1935. E. s. BEcKl-:TTE 2,026,015

MAGNETI C BRAKE STRUCTURE original Filed June e, 1931 v 2 sheets-sheet 1 gml Dec. 31, 1935. E, s, BECKETTE' 2,026,015

MAGNET I C BRAKE STRUCTURE Original Filed June 6, 1931 2 Sheets-Sheet 2 y L 34a ,V 42' Patented Dec. 31, 1935 UNITED STATES ATENT OFFICE MAGNETIC BRAKE STRUCTURE Original application June 6, 1931, Serial No. 542,677. Divided and this application July 28,

1932, Serial No. 625,326

8 Claims. (Cl. 18S- 165) This invention relates to magnetic track brakes for vehicles and constitutes a division of the subject matter of the application, Serial No. 542,677, led June 6, 1931 in the name of the present inventor.

The main objects of the present invention are to provide a simple, stable and otherwise improved means for mounting magnetic brakes for trucks and, in one form of the invention, to eliminate relative vertical movement between the rail and brake shoes due to true functioning of the truck springs.

These objects and others hereafter appearing are attained by the structures illustrated in the accompanying drawings in which Figure 1 is a half longitudinal side view of a truck embodying the invention.

Figure 2 is a half vertical section taken on the transverse center line of the truck.

Figure 3 is a detail vertical transverse section taken substantially on the line 3 3 of Figure 1 but showing the structure on the left hand side of the truck.

Figures 4 and 5 are detail vertical longitudinal and transverse sectional views, respectively, illustrating a modified form of the brake mounting structure.

Figure 6 is a detail horizontal section taken on the line 6 6 of Figure 1.

Figure 7 is an inside view of a longitudinal half of one of the brake shoes and its guide and support brackets and is taken on the line 1 1 of Figure 3.

Figure 7a is a longitudinal section of the same and taken on the line 1ct-1a of Figure 3 but with the shoe operating mechanism in section.

The truck illustrated in Figures 1 to 3 comprises a frame including wheel pieces I having pedestals 2, receiving the journal boxes (not shown), and spaced intermediate transoms 3. Between the transoms is a bolster 4 having a center plate structure 5, side bearing 6, and depending jaws 1 at the outer ends.

Pivotally secured in eyes 8 in the transoms at each side of the truck is a swing hanger 9 having a semi-cylindrical bar IIl at the bottom which mounts a bearing II interposed between and bearing against jaws 1. Seated upon the bearing II is the lower band I2 of an elliptic spring I3, the upper band I4 thereof supporting the end of the bolster. This structure relieves the elliptic springs of transverse forces due to swinging of the bolster and prevents tilting of the springs, as is more fully described in the co-pending application referred to above.

Spaced equalizers I located on each side of the pedestals 2 are carried by the journal boxes A on the truck axle B and mount spring seats I6 for coil springs I1 which support the truck frame. The frame is also provided with depending brackets I8 for mounting an electric motor.

Secured to the equalizer bars intermediate the wheels I9 are brackets 20 each having bifurcations secured to the equalizer bars by means of bolts 2| Each bracket includes a U-shaped portion reinforced by horizontal ribs 30 and located inwardly from the equalizers I5 and having side and end walls 22 provided with liners 23 and serving as guides for the magnetic brake shoes 24. The end wall of the guide bracket is anged at the top, as at 25, and mounts a Z-shaped bracket 26 which supports a pneumatic cylinder 21.

Located between the brake shoes 24 are coils, as indicated at 28, suitably connected with a source of electric current. The brake shoes and coils are supported by rods 45 which are operated by a piston 45a. in cylinder 21. Air is admitted to the cylinder 45h to lower the brake shoes into contact with the rail, closing the gap between the shoes, and when the air pressure is released the brake is raised by a spring 45e inside the cylinder.

It will be seen that in this form the entire brake structure is supported from members not affected by the sp-ring action so that any tendency of the brake shoes to be withdrawn from the rails due to irregularities therein is reduced to a minimum. In order to adequately transmit braking forces to the truck frame, I provide a stop 3I secured between the equalizers I5 adjacent each pedestal.

In Figures 4 and 5, the guide bracket 33 comprises a downward extension on the bracket 34 depending from transom 39, bracket 33 having an outwardly projecting U-shaped portion reinforced by horizontal ribs 35 and having side walls 36 serving as guides for the brake shoes 31. No connection is made with the equalizers 38. Secured tothe side of bracket 34 is an angle 40 which mounts pneumatic cylinder 4I and brake operating rod 42. A beam 43 extends between and reinforces the brackets 33 and 34 on each side of the truck. Bracket 34 has a shelf 34a for yieldingly supporting a transverse beam 44 which in.V

turn supports a motor (not shown). The moto-r and its yielding support means aside from the bracket 34, do not constitute the present inventio-n. In this form the construction of the truck is simplified and strengthened due to the integral formation of the transom, motor support bracket, and brake guides. This structure is further described in the above-mentioned co-pending application, of which the present application constitutes a division.

Obviously, the invention may be advantageously applied to any type of vehicle operating on rails, the magnetic brake being particularly useful in wet weather when theV usual air brakes prove inadequate due to sliding of the wheels on the rails. Various details of the invention such as the construction of the truck illustrated and also the magnetic brake operating device are not essential and these may be modied in various respects 4 without departing from the spirit ofthe invention. I contemplate the exclusive use of all such modifications as come within the scope of the appended claims.

What is claimed is:

1. In a railway truck, a transom, a bracket projecting therefrom and having elements for mounting a motor, said bracket also having a portion extending horizontally and including vertical guides, a magnetic track brake shoe positioned between said guides,` and means carried by said bracket for raising and lowering said shoe.

2. In a railway truck, a bracket near a side of the truck and having depending guide elements positioned outwardly and downwardly therefrom for a track brake shoe and also having an inwardly extending ledge for supporting a motor.

3. In a railway truck, a truck frame comprising wheel pieces and spaced transoms, an elongated magnetic track brake shoe, mechanism for raising said brake shoe, and a bracket on each of said transoms, each of said brackets having a portion depending from the supporting transom and located inside of said brake shoe and said mechanism and a part projecting outwardly from said portion and forming a guide for the end portion of said brake shoe.

4. Structure as specied in claim 3 with the 5 addition of a bolster movable vertically between said transoms and a tie member between the depending portions of said brackets and beneath said bolster for reinforcing the structure.

5. Structure asspecified in claim 3 in which 10 said horizontal portion of said bracket extends laterally from said vertical portion in close proximity to the rail and around the end portion of said brake shoe so as to prevent longitudinal movement of said brake shoe while permitting 15 vertical movement thereof.

6. Structure as specified in claim 3 in which said shoe raising mechanism is mounted on the depending portion of said bracket.

'7. In a railway truck, framing including wheel 20 pieces, brackets depending from portions of said framing located immediately inwardly of said wheel pieces, motor support means located between said bracketsk and carried therefrom, and track brake guide means positioned downwardly 25 and outwardly from said brackets and carried thereby.

8. In a railway truck, framing and supporting wheels, bracket structure depending from said framing immediately adjacent said wheels, motor 301 support means on a portion of said bracket structure, and track brake guide means on another portion of said structure and disposed downwardly and laterally therefrom.

EDMUND S. '.BECKETTE. 

